My left bicep muscle tore several years ago with no pain and I wads unaware of the tear until I noticed a Popeye appearance while shaving one morning. On a visit with my orthopedic doc for another reason, he asked me how did you tear your muscle . I couldn t answer & never had any pain. Yesterday I lifted my right arm up and felt a minor pain in my bicep and this am there is bruising on that muscle. I have been working out for 3+years strengthening my rotator cuffs in both shoulder using a 5 lb weight and rubber bands prescribed by my doc using exercises by my physical therapist. Could there be any blood, hormone etc causes affecting my muscles? I am a 75 yr old man in good health, taking statins, aspirin, lotensen, Celebrex & various OTC drugs. I am not a diabetic nor do I have any cardiovascular disease. Also take 300 mg of Wellbutrin. Any thoughts? Thanks, David Peck